package com.beijing.thread;

/**
 * @Author Ma Wenqi
 * @Date 2021/3/27 19:05
 * @Version 1.0
 */
//死锁：多个线程互相抱着对方需要的资源
public class DeadLock {

    public static void main(String[] args) {
        Makeup m1 = new Makeup(0,"小黑");
        Makeup m2 = new Makeup(1,"小白");

        m1.start();
        m2.start();
    }
}

//口红
class Lipstick{

}

//镜子
class Mirror{

}

//化妆
class Makeup extends Thread{

    //需要的资源只有一份，用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();

    int choice;   //选择
    String name;   //使用化妆品的人

    public Makeup(int choice, String name) {
        this.choice = choice;
        this.name = name;
    }

    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    //化妆，互相持有对方的锁，就是需要拿到对方的资源
    private  void makeup() throws InterruptedException {
        if(choice ==0){
            synchronized (lipstick){  //获得口红的锁
                System.out.println(this.name+"获得口红的锁");
                Thread.sleep(1000);

                synchronized (mirror){  //一秒钟后想获得镜子的锁
                    System.out.println(this.name+"获得镜子的锁");
                }
            }
        }else{
            synchronized (mirror){  //获得镜子的锁
                System.out.println(this.name+"获得镜子的锁");
                Thread.sleep(2000);
                synchronized (lipstick) {  //两秒钟后想获得口红的锁
                    System.out.println(this.name + "获得口红的锁");
                }
            }
        }
    }

}